/*
 * Copyright (c) 2022 Oracle and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.helidon.microprofile.messaging;

import org.eclipse.microprofile.reactive.messaging.OnOverflow;

/**
 * Emitter used for {@link org.eclipse.microprofile.reactive.messaging.OnOverflow.Strategy#THROW_EXCEPTION}.
 */
class ThrowEmitter extends PlainEmitter {
    ThrowEmitter(String channelName, String fieldName, OnOverflow onOverflow) {
        super(channelName, fieldName, onOverflow);
    }

    @Override
    void validate(Object item) {
        super.validate(item);
        if (getOverflowStrategy() == OnOverflow.Strategy.THROW_EXCEPTION && !hasRequests()) {
            throw new IllegalStateException("Backpressure error, downstream didn't request enough data for another send.");
        }
    }
}
